sand <p>Material consisting of fragmented particles of mostly siliceous rock, specifically as it appears on the surface of a beach or a desert. Individual particles may range in diameter from approximately 0.0008-0.08 inch. Most rock-forming minerals at the Earth's surface may be constituents of sand, but a limited number are common. Quartz is most common.</p> <p><span class="page">http://vocab.getty.edu/page/aat/300014341</span><br /> Source: AAT</p>